Q1/ A centrifugal pump operates is discharging 1440 liters of water per minute against head of 60 m and rotates at 320 rpm. The vanes are curved back at an angle of 35 at outer periphery. The normal component of velocity of flow at outlet is 0.28 times the corresponding impeller speed. Determine diameter of the impeller. Assume radial entry flow.

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Buckling of columns

The column is described as a vertical member of the structure that carries an axial compressive load, and buckling is a lateral deformation of the column under the application of load.